That'd be Peltier cooling, aka thermoelectric cooling. Runs through sending current through two dissimilar conductors. That's about the 4th level up in cooling, you'll find it on high-end water and incredibly high-end air. Problem with it is that it can push the limit of your PSU, unless it runs off of an external power supply. Most people tend to skip right past it to phase change cooling.
1. Passive Air
2. Active Air (fans)
3. Water/TEC Air
4. TEC Water
5. Phase change cooling (Prometia, Vapochill, etc.)
6. Phase change cascades (the very top of the line)